GPT-5.6 Luna vs Grok 4.5

Comparing two large language models (llm) models: features, pricing, pros and cons.

	GPT-5.6 Luna	Grok 4.5
Provider	OpenAI	xAI
Pricing	$20–120/mo	$50–300/mo
Quality	8.4/10	9/10
Speed	9.5/10	8.5/10
Ease of use	8.5/10	7.8/10
Value	8/10	5/10
Context	256K	256K
Tasks	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search	Text Generation, Chatbots, Coding, Data Analysis, Translation, RAG / Search
Pros	+ High speed + Low cost + Good for high-volume tasks	+ Strong Big Tech alternative + Current lineup
Cons	− Weaker than flagships on hard reasoning	− Fewer ecosystem integrations

GPT-5.6 Luna

Fastest and cheapest GPT-5.6 tier for light tasks and high throughput.

xAI model — alternative in the July 2026 flagship list.